Date: Sat, 29 Jan 2005 04:50:55 +0000
From: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
To: Vojtech Pavlik <vojtech@suse.cz>
Cc: Roman Zippel <zippel@linux-m68k.org>, Andries Brouwer <aebr@win.tue.nl>,
       linux-kernel@vger.kernel.org
Subject: Re: Possible bug in keyboard.c (2.6.10)
Message-ID: <20050129045055.GS8859@parcelfarce.linux.theplanet.co.uk>
References: <Pine.LNX.4.61.0501270318290.4545@82.117.197.34> <20050127125637.GA6010@pclin040.win.tue.nl> <Pine.LNX.4.61.0501272248380.6118@scrub.home> <20050128105937.GA5963@ucw.cz>
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On Fri, Jan 28, 2005 at 11:59:37AM +0100, Vojtech Pavlik wrote:
> I'm very sorry about the locking, but the thing grew up in times of
> kernel 2.0, which didn't require any locking. There are a few possible

Incorrect.  You have blocking allocations in critical areas and they
required locking all way back.

> races with device registration/unregistration, and it's on my list to
> fix that, however under normal operation there shouldn't be any need for
> locks, as there are no complex structures built that'd become
> inconsistent. 

Um-hm...  Vojtech, meet USB mouse; USB mouse, meet Vojtech.  Now watch
a disconnect and reconnect happening when luser suddenly gets overexcited
and jerks the wrong hand a bit too hard while browsing the most profitable
sort of website...

> If you find scenarios which will lead to trouble in the event delivery
> system, please tell me, and I'll try to fix that as soon as possible.

See above.  Devices appearing and disappearing *are* normal.  
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